The driver determined by the speedometer that from the beginning of the movement of the car, its reading increased
| February 18, 2021 | education
The driver determined by the speedometer that from the beginning of the movement of the car, its reading increased by 1436 km. How long did the car move if the average speed of its movement was 45 km / h.
Initial data: S (change in speedometer readings, distance traveled) = 1436 km; Vav. (average vehicle speed) = 45 km / h.
SI system: S = 1436 km = 1436 * 1000 m = 1436000 m; Vav. = 45 km / h = 45 * 1000/3600 = 12.5 m / s.
We calculate the driving time of the car using the formula:
t = S / Vav. = 1,436,000 / 12.5 = 114,880 s = 1914 min 40 s = 31 h 54 min 40 s.
Answer: The car was moving for 31 hours 54 minutes 40 seconds.
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